linux-kernel - Re: [RFC][PATCH 01/17] x86/alternative: Unconditional custom return thunk

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Message-ID: <20230810113736.GDZNTMAGTbzwxSdjbx@fat_crate.local>
Date:   Thu, 10 Aug 2023 13:37:36 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     x86@...nel.org, linux-kernel@...r.kernel.org, David.Kaplan@....com,
        Andrew.Cooper3@...rix.com, jpoimboe@...nel.org,
        gregkh@...uxfoundation.org
Subject: Re: [RFC][PATCH 01/17] x86/alternative: Unconditional custom return
 thunk

On Wed, Aug 09, 2023 at 09:12:19AM +0200, Peter Zijlstra wrote:

Please add a verb to the subject:

"Make the custom return thunk unconditional"

or so.

> There is infrastructure to rewrite return thunks to point to any
> random thunk one desires, unwrap that from CALL_THUNKS, which up to
> now was the sole user of that.

And yes, provided we can do the thing in the next patch which makes
sense to me, ack.

-- 
Regards/Gruss,
    Boris.

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